<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
  <h1>修改商品</h1>
  <input type="text" readonly>
  <input type="text" placeholder="标题">
  <input type="text" placeholder="价格">
  <input type="text" placeholder="库存">
  <input type="button" value="修改"  @click="update()">
</div>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
<script>
    let v = new Vue({
        el:"body>div",
        data:{
        p:{
         id:"", title:"",price:"",num:""
        }
        },
        methods:{
            update(){
                axios.post("/update",v.p).then(function ())
                alert("修改完成")
                location.href ="/"
            }
        },
      created:function () {
        axios.get("/selectById"+location.search).then(function (respomse) {
              v.p = respomse.data;
        })
      }


    })
</script>
</body>
</html>